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The variegations in each of 3 colors chosen for this striped pullover, provide lots of visual interest. In addition to the color play, some stripes are worked in an uncomplicated yet attractive lace pattern. The interactions between colors and textures in the stripes reminded me of geological formations, hence the name!
If you like working on your sweaters from the top down and playing with color combinations - that is a project for you!

Sizes
Women’s XS (S, M, L, XL, 2XL), {3XL, 4XL, 5XL, 6XL}: to fit bust 28-30 (32-34, 36-38, 40-42, 44-46, 48-50, 52- 54, 56-58, 60 62, 64-66)”/71-76 (81-86, 91-96, 102-107, 112-117, 122-127, 132-137, 142-147, 150-155, 160-165) cm.

Finished Measurements
30¼ (34½, 38¾, 43, 47½, 51¾), {56, 60½, 64, 68}”/75.5, 86.5, 97, 107.5, 119, 129.5), {140, 151.5, 160, 170} cm bust circumference.
Intended ease: +2-5”/5-12.5 cm
Shown in size M (38¾”/97 cm) on 36”/90 cm bust with 2¾”/7 cm of positive ease.

Yarn
Fingering weight yarn (approximate total amounts): 1085 (1230, 1370, 1560, 1700, 1840), {2020, 2170, 2300, 2440} yards/992 (1124, 1252, 1426, 1556, 1681), {1846, 1984, 2093, 2230} m.

Color A (tan): 570 (640, 720, 820, 890, 970), {1060, 1140, 1210, 1280} yards/521 (585, 658, 749, 813, 886), {969, 1042, 1106, 1170} m.
Color B (brown): 350 (400, 440, 500, 550, 590), {650, 700, 740, 785} yards/320 (365, 402, 457, 503, 539), {594, 640, 676, 718} m.
Color C (navy): 165 (190, 210, 240, 260, 280, 310), {330, 490, 350, 375} yards/151 (174, 192, 220, 240, 256), {283, 302, 320, 343) m.

Work Play Knit MN Sock (75% Superwash Merino Wool, 25% Nylon; 463 yards/423 m in 3.5 oz/100 g), Color A (tan): Indiana, 2 (2, 2, 2, 2, 3), {3, 3, 3, 3} skeins.
Color B (brown): Foxhole, 1 (1, 1, 2, 2, 2), {2, 2, 2, 2} skeins.
Color C (navy): Sailor, 1 skein.

Needles
Sizes US 4/3.5 mm: 24-32”/60-80 cm circular.
Size US 3/3.25 mm: 24-32”/60-80 cm circular and 16”/40 cm. (Optional: spare needles of the same size).
Set of double-pointed needles of the same sizes.
Adjust needle size if necessary to obtain gauge.

Notions
Stitch markers, removable stitch markers or safety pins, waste yarn, tapestry needle.

Gauge
26 stitches and 38 rounds = 4”/10 cm in Stockinette Stitch or charted pattern on size US 4/3.5 mm needle, after blocking.

Notes
• This top is worked from the top down in rows to underarms, then front and back are joined and the body is worked in the round.
• Stitches for sleeves are picked up along the armholes and sleeves are worked in the round from the top down.
• Yoke chart is worked in rows: read all odd-numbered chart rows from right to left; even-numbered from left to right. The body chart is worked in the round: all chart rows are read from right to left.